Construction of vertical full rotary hook for sewing machine
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United States of America Patent
Stats
-
Nov 26, 2013
Grant Date -
Jun 23, 2011
app pub date -
Dec 17, 2010
filing date -
Dec 21, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An inner rotary hook has a needle drop hole, and side wall portions formed over the drop hole and defining a space for passage therethrough of a sewing needle. The side wall portions are located adjacent to opposite sides of the needle passing through the space and extend from a region in front of the needle to a region behind the needle. The side wall portions can abut against an upper thread, passed through a hole of the needle, near a bottom dead point of the needle. If any of two portions of the thread located forward and rearward of the needle has strayed laterally, it can abut against one of the wall portions. Consequently, it is possible to prevent the front-side upper thread portion from circling around behind the needle, but also prevent the rear-side upper thread portion from straying laterally to form a laterally-protruding loop.
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Family
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Cited Art Landscape
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